Alarm-lock.



J. E. ZMUDZINSKI.

ALARM LOCK.

APPLICATION FILED APR. 3, I915.

Patented Jan. 22, 1918.

Z SHEETSSHEET I.

J. E. ZMUDZINSKI.

ALARM LOCK.

APPLICATION FILED APR. 3. 1915 Patented Jan. 22, 1918.

2 SHEETS-SHEET 2.

Q a gwmn In J glwuv/wfm JEZmlidZMski pnrrnn srarns rn'rnn' r orrnon.

JOHN E. ZMUDZINSKI, OF BROOKLYN, NEW YORK.

ALARM-LOCK.

menses.

Specification of Letters Patent.

Patented Jan. 22., 191%..

Application filed April 3, 1915. Serial No. 18,975.

Alarm-Locks; .and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to locks, and the primary object of the invention is to associate with a lock embodying a slidable latch, a signaling mechanism which will sound an alarm upon malicious tampering with the lock.

Another object of this invention is to provide an alarm' attachment for a lock, which is practically burglar-proof, in that, it will sound an alarm upon the unlocking of the lock. 1

Another object of this invention is to provide an alarm attachment Which embodies a bell, a rotatable sleeve which is connected to the sliding lock latch, a central pin which is rotatably mounted in said sleeve and carries a transversely extending swinging member, and to connect strikers for the bell to said rotatable sleeve for sounding an alarm upon the rotation of the sleeve and the central pin carried thereby.

l/Vith the foregoing and other objects in view, this invention consists in certain novel featuresof construction, combination and arrangement of parts as will be hereinafter more fully described and illustrated in the accompanying drawings and claimed.

In describing the invention in detail, reference will be had to the accompanying drawings, wherein like characters designate like or corresponding parts throughout the several views and in which,

Figure 1 is a central sectional view taken through the improved alarm lock,

Fig. 2 is a planview of the alarm sounding mechanism,

Fig. 3 is a sectional view through the hell or signal,

Fig. 4 is a fragmentary view of a part of the locking mechanism,

Fig. 5 is a cross sectional view on the line 5-5 of Fig. 1,

Fig. 6 is a sectional view taken through a part of the alarm sounding mechanism,

Fig. 7 is a sectional view through the key used for unlocking the lock, and

F ig. 8 is a cross sectional view on the line S-8 of Fig. ,7. Referring more particularly to the drawings, 1 designates a fragment of a door or other hinged member which is to be locked in a closed position, and which has a spring controlled locking latch 2 carried thereby, the shank of which projects transversely through the door and has a spiral spring 3 coiled about the same. One end of the spiral spring 3 engages a shoulder 4. formed,

in the door, by the cutting out of a recess 5 therein, and they other end of the spring abuts the inner end of the latch 2.

The latch 2 has an arm 9 secured thereto, whicharm curves outwardly from the latch and is pivotally connected at 10 to a second army 11. The arm 11 has one end secured to a sleeve 12. The sleeve 12 is rotatably mounted within a second sleeve 13, which is inserted in the door 1 and has formed thereon a key socket 14. The sleeve 12 projects through the sleeve 13 and has communication with the key socket 14, as-

19, forming the peripheral extending lugs 20, to which are secured metallic straps 21.

Bell strikers 2:2 are carried by the metallic straps 21 and the I extend beyond the periphery of the disks or outstanding lugs 20 of the disks 17 and 18, and are adapted to strike against spring tongues 23 which are formed upon and spaced circumferentially about the inner surface of an alarm bell 24c, The spring tongues 23 are positioned in circumferential rows, one above the other, so as to receive the strikers 22 carried by both of the disks 17 and 18.

The bell 2l-is supported by a supporting versely, as is shown at 27 and secured to the base of the look. A depending sleeve 28 extends inwardly from the central axis of the bell 21 and is secured thereto by any suitable means (not shown), such as a screw, rivet, etc. The sleeve 28 is received in the collar 26 of the bracket and is soldered to the same. The "sleeve 28 is provided with internal screw threads, as shown at 29, which are provided for engagement with external screw threads 30 which are formed upon a pin 31. -The pin 31 extends upwardly through the sleeve 12, and has its lower end sharpened to form a substantially pyramidal shaped point 32, immediately above, the face or which the pin is cut to form a triangular shape in cross section,'-as indicated at 33. A swinging-member 35 is passed through th pin 31 adjacent its upper end, which striking member has its ends bent downwardly and. inserted through openings 36 and 37 formed in the disks 17 and 18upon opposite sides of the central axis otthe disks and the sleeve, as is clearly shown in Fig. 1 of the drawings.

The sleeve 12 is provided with internal screwthreads 38 formed therein, which are positioned above the lower end of the triangular extension 33 of thepin 31. The screw threads 38 extend only over a short distance otthe length of the sleeve and are Y. provided for meshing engagement. with the external screw threads 39 which are formed upon a key 40. The-key 40 has a barrel etl, which is provided with a longitudinally extending recess--it2 extending inwardly'trom one end of the barrel and terminating in a pyramidal shaped recess 43 for receiving the pyramidal end 32 of the pin. The recess 42 :of'the key barrels]. has a triangular shaped portion 41% formed therein, which triangularly shaped portion is provided for engagement with the .triangular portion 33 ot' the pin 31 for rotatingthe pin upon rotation of the key; The handle 15 is formed upon the key-10. toprovidefor the manual rotation I thereof.

V To unlock the improved alarm lock heretofore described the key a0 is inserted'in the sleeve 12 and shoved on the pin 31 until the- 7 threads 38and 39begin to engage and upon turning the key, said key will thread along the inside of the sleeve 12 until the threads 38 and 39 are in entire engagement. During this time thepin 31 has been threading ou'ttot engagement with the sleeve 12 and into the sleeve 28 andthe bell hasbeen consequently rung through the bar 35 which rotates the disks 17 and 18, which throws "run-a predetermined time before the latch can be operated.

From the foregoing description taken in connection with the accompanying drawings the advantages of construction and 01 the method of operation of the improved alarm lock will be readily apparent to those skilled in the art to which this invention appertains and, while in the foregoing description, the principle of the operation of this invention has been described together with various features of construction, it is to be understood that certain minor features of construction, combination and arrangement of parts may be altered to suit practical conditions provided such alterations are comprohended within the scope of what is claimed.

That is claimed is 1. In an alarm lock, a sleeve, a shank rotatably mounted in said sleeve and extending outwardly of the same, a bell inclosing said sleeve and shank, a latch operatively connected to said sleeve, a second sleeve rotatably inclosing said first mentioned sleeve, a series of disks carried by said second sleeve, means carried by said disks for striking said bell when the disks are rotated, and means for engaging said first-mentioned sleeve and shank to operate said latch and ring said bell.

2. In an alarm lock, a sleeve, a shank rotatably mounted in said sleeve and extending outwardly of the same, a bell inclosing said sleeve and shank, a latch operatively connected with said sleeve, a second sleeve rota-tably inclosing said first named sleeve, a series of disks carried by said second sleeve, means carried by said disks for striking said bell when the disks are rotated, the inner portion of said shank being reduced and non-circular in cross section, and a key for rotating said first-mentioned sleeve to operate said latch, said key having an aperture'non-circular in cross section to receive the reduced end of said shank, whereby said shank is'rotated and the bell rung.

In testimony whereof I ailix my signature in presence of two witnesses.

JOHN E. ZMUDZINSKI.

Witnesses HELEN D. W inss, HAROLD J. KENNEDY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

'Weshington;ID. 0. 

